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2."DOOR" Circuit
Theory of the "DOOR" Circuit:
Providing that the 4 amp fuse, the 24 volt transformer, and the overloads (drive and blower) are okay, 24 A/ C volts will be supplied to the "COM" terminal of the door switch relay. This 24 volts is branched off through the lint drawer switch, and the two magnetic door switches to then supply the 24 volts to the coil of the door switch relay. The relay will now close sending the 24 A/C volts that was supplied to the "COM" terminal of the relay to the "N/O" terminal of that relay which in turn goes directly into the computer 15 pin connector #2.
Path of the "DOOR" Circuit:
The "DOOR" circuit in the
C.One of the secondary wires gets grounded while the other one is fused with a 4 amp buss type fuse, and it's then present at terminal block "C". We should now be able to get the 24 volts A/C between terminal block "C" and ground. If the 24 volts is not present here then the problem could only be bad 4 amp fuse or the 24 volts transformer has failed. The 24 volts leaves "C" and travels through the blower and the drum overloads, this is the first place to check when the "DOOR" signal comes on the display when these overloads trip, it immediately displays "DOOR". The voltage now travels through some connectors (J1 and J3 pin #2 of each) and lands on terminal block #2, connecting point #2. This here is where the voltage will split. From here it will go to the door switch relay "com" terminal, and it will also travel through some connectors, see the diagram above for particular connectors and there pin#'s, and land on one terminal of the lint drawer switch. This is another spot to check if "DOOR" appears on the display. The voltage will then pass through the lint drawer switch, providing the lint drawer is closed, go through a few connectors (see above diagram) and land on one pin of the magnetic door switch. Here we use two magnetic type door switches. When the door is closed there are magnets on the door that should be adjusted so that when the door is closed the magnets are positioned above the
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